Aluminum Extruded Heat Sink

Product Specifications

Technical details and manufacturing context for Aluminum Extruded Heat Sink

Definition

An aluminum extruded heat sink is a passive cooling component manufactured through aluminum extrusion processes. It features precisely engineered fins and base structures to maximize surface area for efficient heat dissipation. These components are critical for thermal management in power electronics, LED lighting, computing hardware, and industrial control systems. They are sold as standalone B2B components to manufacturers who integrate them into larger assemblies.

This directory entry provides reference specifications for aluminum extruded heat sinks. Typical base lengths range from 100 to 600 mm, base widths from 50 to 300 mm, fin heights from 10 to 100 mm, and fin counts from 5 to 30. Material grades commonly specified include aluminum alloys 6063 and 6061, with 6063-T5 referenced under GB/T 3190. Thermal conductivity values are typically between 180 and 210 W/(m·K). Surface roughness is often specified as Ra 0.8–1.6 μm, and straightness tolerance is ±0.5 mm/m per ISO 2768. Operating temperature range is -40 to 150 °C. Surface treatment may include anodizing per MIL-A-8625, which improves corrosion resistance and emissivity. Weight per meter ranges from 0.5 to 5 kg, depending on dimensions.

These values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. Standards listed are procurement references, not certifications of compliance. The heat sink is a component; its performance depends on the thermal interface, airflow, and mounting in the final assembly. Buyers should confirm all parameters, including material grade, surface treatment, and tolerances, before integration.

Working Principle

The heat sink operates by conducting heat from a heat-generating component (such as a power transistor or LED) through its aluminum base. The base is typically flat to ensure good thermal contact. Heat then spreads into the fins, which are thin vertical extensions that increase the surface area exposed to the surrounding air. Heat is transferred from the fins to the air via natural convection (air movement due to temperature differences) and radiation. The efficiency of this process depends on the thermal conductivity of the aluminum alloy, the fin geometry, and the ambient airflow. In forced convection systems, a fan may be used to increase airflow over the fins, enhancing heat dissipation. The heat sink is a passive component; it requires no power to operate. Proper mounting with a thermal interface material (such as thermal paste or pad) is essential to minimize contact resistance and maximize heat transfer.

Common Materials

aluminum alloy 6063, aluminum alloy 6061, anodized aluminum coating

Technical Parameters

Parameter	Typical range	Notes & selection driver
Base LengthRequired	100–600 mm	Length of mounting surface
Base WidthRequired	50–300 mm	Width of mounting surface
Fin HeightRequired	10–100 mm	Height of cooling fins
Fin CountRequired	5–30 pcs	Number of cooling fins
Material GradeRequired	6063-T5	Aluminum alloy specificationGB/T 3190
Thermal Conductivity	180–210 W/(m·K)	Higher is better for heat transfer
Surface Roughness	Ra 0.8–1.6 μm	Affects contact thermal resistance
Straightness Tolerance	±0.5 mm/m	Ensures proper mountingISO 2768
Operating Temperature	-40–150 °C	Exceeding may cause deformation
Surface Treatment	Anodized	Improves corrosion resistance and emissivityMIL-A-8625
Weight	0.5–5 kg/m	Depends on dimensions

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Base Plate Part
Thermal interface with heat source

Material: Aluminum Alloy
Cooling Fins Part
Heat dissipation surface area

Material: Aluminum Alloy

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Aluminum Extruded Heat Sink.

Manufacturers of Aluminum Extruded Heat Sink

Manufacturer profiles associated with Aluminum Extruded Heat Sink.

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Frequently Asked Questions

What are the typical dimensions of an aluminum extruded heat sink?

Typical base lengths range from 100 to 600 mm, base widths from 50 to 300 mm, fin heights from 10 to 100 mm, and fin counts from 5 to 30. These are reference ranges; exact dimensions depend on the specific model and application.

Which aluminum alloys are commonly used for extruded heat sinks?

Common alloys include 6063 and 6061. The directory lists 6063-T5 as a reference grade under GB/T 3190. The actual grade should be confirmed with the supplier for the intended application.

What is the typical thermal conductivity of these heat sinks?

Thermal conductivity is typically between 180 and 210 W/(m·K), depending on the alloy and temper. Higher values indicate better heat transfer, but actual performance also depends on fin design and airflow.

What surface treatments are available?

Anodizing is a common surface treatment, referenced under MIL-A-8625. It improves corrosion resistance and emissivity, which can enhance radiative heat transfer. Other treatments may be available from suppliers.

Data Basis

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Preliminary Technical Classification

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pressure:	Atmospheric to 1 bar (non-pressurized applications)
other spec:	Natural convection or forced air flow up to 2 m/s
temperature:	-40°C to 150°C

Product Specifications

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